Steam and gas boiler.



B. BUUDA.

STEAM AND GAS BOILER.-

APPLICATION FILED IAN-16.13.17.

Patented; %ept. 4, 191?.

EQES SVWD m, T r m IIW B 1 his ATTMWEM- UNI STAS ANT IBOHUMIL BOUDA, OF AUSTIN, MINNESOTA.

STEAM AND GAS BOILER.

Specification of Letters Patent.

Patented Sept. 4, 11917.

Application filed January 16, 1917. Serial No. 142,673.

To all whom it may concern:

engines, and the main object is to run an engine by the minimum quantity of fuel. This object I attain by the novel method of running the engine by a combination of steam and the air expanded by the heat created in the combination chamber or furnace of the boiler. In carrying, out this method I may use different kinds of fuel, but for purpose of illustration and explanation I will suppose that in the present instance crude petroleum or similar oil is the fuel.

In the accompanying drawing: Figure 1 is an isometric longitudinal vertical section of a horizontal steam boiler embodying my invention and an engine, tank and pumps operatively connected therewith. Fig. 2 is an enlarged detail view of a sighting tube used for looking into the combustion chamber. Fig. 3 is a front end elevation of the boiler with its front plate removed.

Referring to the drawing by reference numerals, 1 designates the outer shell of the steam boiler, the braces and stays of which are not shown. 2 designates water in the boiler. The front sheet 3 of the shell is secured by bolts 4 so as to be removable for purpose of inserting and removing a firebox 5, which is lined with tile 6. From said fire box extend rearwardly to a chamber 7 a. series of tubes 8 and from the upper part of the chamber 7 extend forwardly to a chamber 9 a series of tubes 10.

The boiler may rest upon suitable legs or supports 11 and have a blow-off pipe 12 provided with a valve (not shown) and upon the boiler is mounted a mixing chamber 13 to which steam is admitted through a valve 14 and hot air from the chamber 9 and its upward tube or flue 15 through a valve 16.

The tube 15 has a large branch 17 extending into a chimney or smoke stack (not shown) and is controlled by a valve 18. Extending from the mixing drum 13 to an engine 19 is a pipe 20 provided with two valves 21, 22. Said pipe 20 is connected to the pipe 17 by a pipe 23 having a valve 24.

Extending from the pipe 20 is further a pipe 25 having .a branch 26 controlled by a valve 27 and supplying steam to an oil pump 28. Another branch 29 of the pipe is con trolled by a valve 30 and supplies steam to an air pump 31.

The function of the oil pump is to keep a reservoir or oil tank 32 constantly partly filled with oil, say up to the line 33, a gage glass 34 indicating the height of the oil. The air pump serves to keep up air pressure upon the oil in the tank 32, a gage 35 serving to indicate the pressure. The pipe 36 from the air pump does not" only fill air upon the oil but also into an air reservoir 37 which may also have a gage 38.

From the air reservoir or tank 37 into the fire box extends a blow pipe 39 having a controlling valve 40. Into said pipe extends a nozzle 41 of an oil feeding pipe 42 extending from the oil tank 33 and having a valve 43. Said pipe is provided with a torch or other suitable device 44 by which the pipe may be heated when the fire is to be started in the furnace 6 during cold weather. 45 is a gage glass to indicate the level of the water in the boiler; 46 is a gage to indicate the pressure in the flue 15, and a gage 47 may indicate the steam pressure in the chamber 13 when the valves 16 and 24 are closed.

Extending into the front of the furnace is a sight tube 48 having a valve 49 and in its outer end a strong lens of glass or mica, 50, (see Fig. 2), held by a screw cap 51 having a central aperture 52 through which the operator may look and observe the condition of the fire in the fire box 6. If the lens should have to be removed for cleaning or repair, the valve 49 may be closed during that period.

53 designates the air intake pipe of the air pump 31, which may be of any suitable con struction. 54 is the pipe through which the pump 28 draws the fuel oil from a reservoir (not shown). 55 indicates a suitable filtering means for the gas to pass through as it enters the mixing chamber 13. 56 is a spark plug inserted in the lower front portion of the fire box and connected by wires 57 to an electric battery (not shown). One of the pressure gages 35, 38 may be dispensed with since the pipe 36 causes the air pressure to equalize in the tanks 32, 37.

In Figs. 1 and 3 is shown how the furnace or entire heating device may be provided with small wheels 58 arranged to travel upon rails 59 fixed in the boiler shell 1, so as to facilitate the removal of the furnace for cleaning and repair. 60 designates brackets or props supporting the front end of the upper tube nest 10 upon the crown sheet 61 of the fire box. e

In the operation of the apparatus, if it be the first operation, after the boiler has been supplied with water and the tank 32 with oil for fuel the torch 44 is'lighted and the passing oil sufiiciently heated to be ignited by the spark plug 57 The smoke and hot air thus created is allowed to pass through pipes 15, 17 into the chimney, until the fire box has become sufficiently heated to ignite and cause combustion 'of a greater flow of oil which is then turned on, the burning oil and gas will now create gas pressure which after valve 18 has been closed may be utilized directly to' operate the oil pump and air pump and even the engine. Meanwhile the burning gas is passing through the tubes 8, 10 of the boiler and producing steam pressure in the mixer 13, where the steam and the air expanded by the heat to a pressure slightly higher than the steam pressure are mixed and afterivalve 24 has been closed is passed through the pipe 20 to the engine and the pumps. The entire apparatus is now in full' operation under any desired pressure of gas and steam, and when it is stopped \by closing the valves 40, 43, 27 and 30 the air pressure in the air tank 37 and oil tank 32 may remain in readiness for next time'the apparatus is to be started.

That a great saving of fuel results from the use of this system and method is obvious, since the power required to run the pumps and keep up a little greater pressure in the oil feeding tube than in the furnace is comparatively small, while the air thus introduced into the furnace with the oil is by the heat in the furnace and its tubes caused to expand to an active volume many, many times greater than the air and oil forced into the furnace.

If the expanding air or gas be considered as an explosion, the apparatus becomes an explosive engine, run by a single continuous explosion.

What I claim is:

A boiler comprising an outer shell with a removable end plate and rails in the lower part of the shell, and a furnace having wheels standing upon said rails.

In testimony whereof I affix my signa ture. V

BOHUMIL BOUDA. 

